Suppression and enhancement of shot noise in mesoscopic transport through localized states

Alex K. Savchenko; Sergey S. Safonov; Sergei H. Roshko; Dmitrii A. Bagrets; Oleg N. Jouravlev; Yuli V. Nazarov; Edmund H. Linfield; Dave A. Ritchie

doi:10.1117/12.497419

8 May 2003 Suppression and enhancement of shot noise in mesoscopic transport through localized states

Alex K. Savchenko, Sergey S. Safonov, Sergei H. Roshko, Dmitrii A. Bagrets, Oleg N. Jouravlev, Yuli V. Nazarov, Edmund H. Linfield, Dave A. Ritchie

Author Affiliations +

Proceedings Volume 5115, Noise and Information in Nanoelectronics, Sensors, and Standards; (2003) https://doi.org/10.1117/12.497419
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

Abstract

We show that shot noise is an informative tool for studies of hopping and resonant tunnelling between localized electron states. In hopping via several states, shot noise is seen to be always suppressed compared with its classical Poisson value S_I = 2eI (I is the average current). The degree of suppression depends on the geometry of current paths and the distribution of the barriers between the localized states. In resonant tunnelling through a single impurity an unusual enhancement of shot noise is observed. It has been established, both experimentally and theoretically, that a considerable increase of noise occurs in the case of two interacting resonant tunnelling channels.

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Alex K. Savchenko, Sergey S. Safonov, Sergei H. Roshko, Dmitrii A. Bagrets, Oleg N. Jouravlev, Yuli V. Nazarov, Edmund H. Linfield, and Dave A. Ritchie "Suppression and enhancement of shot noise in mesoscopic transport through localized states", Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); https://doi.org/10.1117/12.497419

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